New letter u for Blackwell Ultra.

The tensor cores are different enough to justify this.
Main use case for GPUs in clouds is AI and the tensor cores do
make a difference there.

Signed-off-by: Kurt Garloff <kurt@garloff.de>

Author: garloff

Standards/scs-0100-v3-flavor-naming.md

@@ -439,7 +439,7 @@ Note that the vendor letter X is mandatory, generation and processing units are
 | `I`      | Intel  | execution units (EUs)           |
 
 For nVidia, the generation N can be f=Fermi, k=Kepler, m=Maxwell, p=Pascal, v=Volta, t=turing, a=Ampere,
-l=Ada Lovelace, g=Grace Hopper, b=Blackwell, ...,
+l=Ada Lovelace, g=Grace Hopper, b=Blackwell, u=BlackwellUltra, ...,
 for AMD GCN-x=0.x, CDNA-x=x, RDNA-x=x.1, RDNA-3.5=3.5, UDNA-x=x
 for Intel Gen9=0.9, Xe(12.1/DG1)=1, Xe(12.2)=2, Arc(12.7/DG2)=3, BattleImage(20.0)=4, ...
 (Note: This may need further work to properly reflect what's out there.)

Standards/scs-0100-w1-flavor-naming-implementation-testing.md

@@ -124,7 +124,7 @@ These have MIG support and 128 Cuda Cores and 4 Tensor Cores per SM.
 [+] The precise numbers for the 1/7 MIG configurations are not known by the author of
 this document and need validation.
 
-##### Blackwell (`b`)
+##### Blackwell (`b`) and Blackwell Ultra (`u`)
 
 These have MIG support and 128 Cuda Cores and 4 Tensor Cores per SM.
 
@@ -134,13 +134,18 @@ These have MIG support and 128 Cuda Cores and 4 Tensor Cores per SM.
 | GB200      | 1/2      |  320     | 10240      |  80 |  96G HBM3e | `GNb-80-96h`   |
 | GB200      | 2/7      |   88+    |  5632+     |  44+|  45G HBM3e+| `GNb-44-45h`+  |
 | GB200      | 1/7      |   44+    |  2816+     |  22+|  23G HBM3e+| `GNb-22-23h`+  |
-| GB300      | 1/1      |  640     | 20480      | 160 | 288G HBM3e | `GNb-160-288h` |
-| GB300      | 1/2      |  320     | 10240      |  80 | 144G HBM3e | `GNb-80-144h`  |
+| GB300      | 1/1      |  640     | 20480      | 160 | 288G HBM3e | `GNu-160-288h` |
+| GB300      | 1/2      |  320     | 10240      |  80 | 144G HBM3e | `GNu-80-144h`  |
 | ... |
 
 [+] The precise numbers for the 1/7 MIG configurations are not known by the author of
 this document and need validation.
 
+Note that Blackwell Ultra tensor cores have significant enough changes vs. Blackwell that we
+gave the BW Ultra GPUs a new letter `u`. In particular, FP4 tensor performance is over 150%
+of std. Blackwell and has more Special Function Units (which helps attention) but has
+regressed INT8 performance.
+
 | Nvidia GPU            | Fraction | Tensor C | Cuda Cores | SMs | VRAM       | SCS GPU name   |
 |-----------------------|----------|----------|------------|-----|------------|----------------|
 | RTX Pro2000 Blackwell |  1/1     |  136     |  4352      |  34 |  16G GDDR7 | `GNb-34-16`    |